Vodacom contract

I'm so mad at Vodacom right now, I have a Vodacom contract which I took 24 months back and this December 2020 it was coming to an end. On the 1st December 2020 I called the cancelation department to place a cancelation notice for 31th December 2020 and the person that I spoke to said it done and gave references which is at work as I'm on leave now and on the 30th December 2020 at 12:52 I called again to just check if the first notice was place and the guy confirmed that yes it was place and come the 1st Jan 2021 my contract will be canceled. This morning when I check my balances on my phone I see is not canceled and the benefits have been loaded, same I called the cancelation department again and I was informed that there was no noticed placed for cancelation now the lady said she has placed the notice but now I have to pay for the benefits that has been loaded yet I didn't want them. I'm complaining about the two gentleman that I spoke to and confirmed that what I wanted was done. Now I have to budget for the what ever Vodacom will bill me for this benefits. My account number is I***, I want Vodacom to check what did this two gentlemen do for them to give me incorrect advice and as a representative registered under regulation what rights give them to give false information.